In:
Nanotechnology, IOP Publishing, Vol. 31, No. 34 ( 2020-08-21), p. 345401-
Abstract:
In this work, a feasible one-pot approach to synthesize manganese oxide/graphene composites, the so-called plasma-enhanced electrochemical exfoliation process (PE 3 P), has been developed. Herein, a composite of graphene decorated with manganese oxide nanoparticles was prepared via PE 3 P from a KMnO 4 solution and graphite electrode under a voltage of 70 V in an ambient environment. By controlling the initial KMnO 4 concentration, we obtained distinct MnO 2 /graphene samples. The prepared samples were characterized by scanning electron microscopy, transmission electron microscopy, x-ray diffraction, x-ray photoelectron spectroscopy, and Raman spectroscopy. The electrochemical measurements of the MnO 2 /graphene composites revealed that the specific capacitance of the samples is approximately 320 F g –1 at a scan rate of 10 mV s –1 , which is comparably very high for manganese oxide/carbon-based supercapacitor electrode materials. Considering the simple, low-cost, one-step and environmentally friendly preparation, our approach has the potential to be used for the fabrication of MnO 2 /graphene composites as the electrode materials of supercapacitors.
Type of Medium:
Online Resource
ISSN:
0957-4484
,
1361-6528
DOI:
10.1088/1361-6528/ab8fe5
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
2020
detail.hit.zdb_id:
1362365-5
SSG:
11
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